A SECRET WEAPON FOR SONGS

A depiction from the 13th century "very long serpent" rocket launcher. The holes inside the frame are meant to maintain the rockets individual, through the 1510 version of Wujing Zongyao. There were also pyramidal tomb buildings during the Song era, like the Song imperial tombs located in Gongxian, Henan.[222] About 100 km (62 mi) from Gongxian